public class Demo03 {

    public static void main(String[] args) {
        // 动态初始化数组
        String[] arr = new String[5];
        System.out.println(arr[0]);

        int[] arr2 = new int[4];
        System.out.println(arr2[3]);

        char[] arr3 = new char[5];
        System.out.println(arr3[3]);

        double[] arr4 = new double[5];
        System.out.println(arr4[3]);

        boolean[] arr5 = new boolean[5];
        System.out.println(arr5[0]);
    }
}
